Signed-off-by: Sergey Kambalin <sergey.kamba...@auriga.com> --- hw/net/bcm2838_genet.c | 222 ++++++++++++++++++++++++++++++++- include/hw/net/bcm2838_genet.h | 1 + 2 files changed, 222 insertions(+), 1 deletion(-)
diff --git a/hw/net/bcm2838_genet.c b/hw/net/bcm2838_genet.c index 98030216f4..0686cb5002 100644 --- a/hw/net/bcm2838_genet.c +++ b/hw/net/bcm2838_genet.c @@ -251,6 +251,21 @@ static bool bcm2838_genet_tdma_ring_active(BCM2838GenetState *s, return active; } +static bool bcm2838_genet_rdma_ring_active(BCM2838GenetState *s, + unsigned int ring_index) +{ + uint32_t ring_mask = 1 << ring_index; + bool dma_en = s->regs.rdma.ctrl.fields.en == 1; + bool ring_en = (s->regs.rdma.ring_cfg.fields.en & ring_mask) != 0; + bool ring_buf_en = (s->regs.rdma.ctrl.fields.ring_buf_en & ring_mask) != 0; + bool active = dma_en && ring_en && ring_buf_en; + + trace_bcm2838_genet_rx_dma_ring_active(ring_index, + active ? "active" : "halted"); + + return active; +} + static void bcm2838_genet_tdma(BCM2838GenetState *s, hwaddr offset, uint64_t value) { @@ -434,9 +449,212 @@ static const MemoryRegionOps bcm2838_genet_ops = { .valid = {.min_access_size = sizeof(uint32_t)}, }; +static int32_t bcm2838_genet_filter(BCM2838GenetState *s, const void *buf, + size_t size) +{ + qemu_log_mask(LOG_UNIMP, + "Packet filtration with HFB isn't implemented yet"); + return -1; +} + +static int32_t bcm2838_genet_filter2ring(BCM2838GenetState *s, + uint32_t filter_idx) +{ + qemu_log_mask(LOG_UNIMP, + "Packet filtration with HFB isn't implemented yet"); + return -1; +} + +static bool is_packet_broadcast(const uint8_t *buf, size_t size) +{ + static const uint8_t bcst_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; + + if (size < sizeof(bcst_addr)) { + return false; + } + + return !memcmp(buf, bcst_addr, sizeof(bcst_addr)); +} + +static bool is_packet_multicast(const uint8_t *buf, size_t size) +{ + return !!(buf[0] & 0x01); +} + +static ssize_t bcm2838_genet_rdma(BCM2838GenetState *s, uint32_t ring_idx, + const void *buf, size_t size) +{ + const size_t DESC_WORD_SIZE = + sizeof(BCM2838GenetRdmaDesc) / sizeof(uint32_t); + + ssize_t len = 0; + BCM2838GenetRegsRdma *rdma = &s->regs.rdma; + BCM2838GenetRdmaRing *ring = &rdma->rings[ring_idx]; + hwaddr write_index = + (ring->write_ptr + ((hwaddr)ring->write_ptr_hi << 32)) / DESC_WORD_SIZE; + BCM2838GenetRdmaDesc *desc = &rdma->descs[write_index]; + + const hwaddr START_INDEX = + (ring->start_addr + ((hwaddr)ring->start_addr_hi << 32)) + / DESC_WORD_SIZE; + const hwaddr END_INDEX = + (ring->end_addr + ((hwaddr)ring->end_addr_hi << 32)) / DESC_WORD_SIZE; + + if (!bcm2838_genet_rdma_ring_active(s, ring_idx)) { + return -1; + } + + desc->length_status.fields.sop = 1; + + while (len < size) { + size_t l = size - len; + size_t buf_size = ring->ring_buf_size & 0xffff; + uint8_t *dma_buf = s->rx_packet; + hwaddr dma_buf_addr = + desc->address_lo + ((hwaddr)desc->address_hi << 32); + MemTxResult mem_tx_result = MEMTX_OK; + uint8_t *frame_buf = dma_buf + sizeof(BCM2838GenetXmitStatus) + 2; + BCM2838GenetXmitStatus *xmit_status = (BCM2838GenetXmitStatus *)dma_buf; + struct iovec iov; + bool isip4, isip6; + size_t l3hdr_off, l4hdr_off, l5hdr_off; + eth_ip6_hdr_info ip6hdr_info; + eth_ip4_hdr_info ip4hdr_info; + eth_l4_hdr_info l4hdr_info; + + if (l > ring->ring_buf_size) { + l = ring->ring_buf_size; + } + + memcpy(frame_buf, buf + len, l); + iov.iov_base = frame_buf; + iov.iov_len = l; + eth_get_protocols(&iov, 1, 0, + &isip4, &isip6, + &l3hdr_off, &l4hdr_off, &l5hdr_off, + &ip6hdr_info, &ip4hdr_info, &l4hdr_info); + + len += l; + + desc->length_status.fields.eop = !!(len >= size); + desc->length_status.fields.buflength = l + + sizeof(BCM2838GenetXmitStatus) + 2; + if (s->regs.umac.cmd.fields.crc_fwd) { + desc->length_status.fields.buflength += 4; + } + desc->length_status.fields.broadcast = + !!is_packet_broadcast(frame_buf, l); + desc->length_status.fields.multicast = + !!is_packet_multicast(frame_buf, l); + + xmit_status->rx_csum = 0; + if (isip4) { + xmit_status->rx_csum = ip4hdr_info.ip4_hdr.ip_sum; + } + xmit_status->length_status = desc->length_status.value; + + mem_tx_result = address_space_write(&s->dma_as, dma_buf_addr, + MEMTXATTRS_UNSPECIFIED, + dma_buf, buf_size); + if (mem_tx_result != MEMTX_OK) { + desc->length_status.fields.rxerr = 1; + } + + if (desc->length_status.fields.rxerr) { + break; + } + + ++ring->prod_index.fields.index; + if (++write_index > END_INDEX) { + write_index = START_INDEX; + } + desc = &rdma->descs[write_index]; + ring->write_ptr = write_index * DESC_WORD_SIZE; + ring->write_ptr_hi = ((hwaddr)write_index * DESC_WORD_SIZE) >> 32; + } + + if (ring_idx == BCM2838_GENET_DMA_RING_DEFAULT) { + s->regs.intrl0.stat.fields.rxdma_mbdone = 1; + } else { + s->regs.intrl1.stat.fields.rx_intrs |= 1 << ring_idx; + } + + return len; +} + +static ssize_t bcm2838_genet_receive(NetClientState *nc, const uint8_t *buf, + size_t size) +{ + BCM2838GenetState *s = (BCM2838GenetState *)qemu_get_nic_opaque(nc); + ssize_t bytes_received = -1; + int32_t filter_index = -1; + int32_t ring_index = -1; + + if (s->regs.rdma.ctrl.fields.en) { + filter_index = bcm2838_genet_filter(s, buf, size); + + if (filter_index >= 0) { + ring_index = bcm2838_genet_filter2ring(s, filter_index); + } else { + ring_index = BCM2838_GENET_DMA_RING_CNT - 1; + } + + if (size <= MAX_PACKET_SIZE) { + bytes_received = bcm2838_genet_rdma(s, ring_index, buf, size); + } + } + + bcm2838_genet_set_irq_default(s); + bcm2838_genet_set_irq_prio(s); + + return bytes_received; +} + +static void bcm2838_genet_phy_update_link(BCM2838GenetState *s) +{ + bool qemu_link_down = qemu_get_queue(s->nic)->link_down != 0; + + if (qemu_link_down && s->phy_regs.bmsr.fields.lstatus == 1) { + trace_bcm2838_genet_phy_update_link("down"); + + s->phy_regs.bmsr.fields.anegcomplete = 0; + + s->phy_regs.bmsr.fields.lstatus = 0; + s->regs.intrl0.stat.fields.link_down = 1; + } else if (!qemu_link_down && s->phy_regs.bmsr.fields.lstatus == 0) { + trace_bcm2838_genet_phy_update_link("up"); + + /* + * Complete auto-negotiation (fixed link partner's abilities for now: + * 1Gbps with flow control) + */ + s->phy_regs.stat1000.fields._1000half = 1; + s->phy_regs.stat1000.fields._1000full = 1; + + s->phy_regs.lpa.fields.pause_cap = 1; + s->phy_regs.lpa.fields.pause_asym = 1; + s->phy_regs.lpa.fields.lpack = 1; + + s->phy_regs.bmsr.fields.anegcomplete = 1; + + s->phy_regs.bmsr.fields.lstatus = 1; + s->regs.intrl0.stat.fields.link_up = 1; + } + + bcm2838_genet_set_irq_default(s); +} +static void bcm2838_genet_set_link(NetClientState *nc) +{ + BCM2838GenetState *s = qemu_get_nic_opaque(nc); + + bcm2838_genet_phy_update_link(s); +} + static NetClientInfo bcm2838_genet_client_info = { .type = NET_CLIENT_DRIVER_NIC, - .size = sizeof(NICState) + .size = sizeof(NICState), + .receive = bcm2838_genet_receive, + .link_status_changed = bcm2838_genet_set_link, }; static void bcm2838_genet_realize(DeviceState *dev, Error **errp) @@ -489,6 +707,8 @@ static void bcm2838_genet_phy_reset(BCM2838GenetState *s) s->phy_aux_ctl_shd_regs.misc = 0x1E; trace_bcm2838_genet_phy_reset("done"); + + bcm2838_genet_phy_update_link(s); } static void bcm2838_genet_reset(DeviceState *d) diff --git a/include/hw/net/bcm2838_genet.h b/include/hw/net/bcm2838_genet.h index 7fbe4d3ea5..8bcf560f87 100644 --- a/include/hw/net/bcm2838_genet.h +++ b/include/hw/net/bcm2838_genet.h @@ -726,6 +726,7 @@ struct BCM2838GenetState { qemu_irq irq_prio; uint8_t tx_packet[MAX_FRAME_SIZE]; + uint8_t rx_packet[MAX_FRAME_SIZE]; }; #endif /* BCM2838_GENET_H */ -- 2.34.1